神经节苷脂GM3对多发性骨髓瘤细胞株U266细胞增殖及细胞周期的影响

目的 观察神经节苷脂GM3对多发性骨髓瘤细胞株U266细胞增殖和细胞周期的影响.方法 各试验组分别加入20、40、80、160μmol/L GM3,同时设置不加GM3的空白对照组.培养U266细胞48 h后采用四甲基偶氮唑盐(MTT)法检测细胞增殖;碘化丙啶(PI)单染流式细胞术检测细胞周期.结果 GM3可以抑制U266细胞增殖,并且随着GM3浓度增加抑制作用增强;不同浓度GM3组(20、40、80、160μmol/L)中U266细胞增殖抑制率依次为(13±4)%、(26±4)%、(47±6)%、(55±10)%,各浓度组与对照组比较差异有统计学意义(F=93.063,P<0.05).GM3处理48 h后,U266细胞中S期细胞比例增高,由(22.6±3.7)%上升到(71.5±3.8)%(P<0.01);G2/M期细胞比例降低,由(42.6±2.5)%降为(0.8±0.6)%(P<0.05);而G0/G1期细胞比例无明显变化(P>0.05).结论 GM3可以阻滞多发性骨髓瘤U266细胞于S期,抑制其增殖.

Effects of ganglioside GM3 on proliferation and cell cycle of multiple myeloma cell line U266

Objective To observe the effect of ganglioside GM3 on the proliferation and cell cycle of multiple myeloma (MM) cell line U266. Methods The experimental groups were treated with 20, 40, 80, 160μmol/L GM3, while the control group was not given GM3. The growth inhibition effect of GM3 on U266 cells after 48 hours were measured by using methyl thiazolyl tetrazolium (MTT) method. The cell cycle was tested by flow cytometry with PI labeling. Results The results indicated that the GM3 displayed anti-proliferative effects on U266 cells in a dose-dependent manner. The cell inhibition rates were (13±4) %, (26± 4) %, (47 ±6) %, (55 ±10) % in different dose of GM3 (20, 40, 80, 160 μmol/L), respectively. There was a difference between the experimental group and the control group (F= 93.063, P< 0.05). At the same time, the cell cycle analysis results showed that the U266 cell ratio in S phase was increased from (22.6 ±3.7) % to (71.5±3.8) %(P<0.01) and in G2/M phase was decreased from (42.6±2.5) %to (0.8±0.6) %(P<0.05) while in G0/G1 phase was not significantly changed. Conclusion GM3 can inhibit the proliferation of MM cell line U266 by blocking them in the S phase.